Compound. No.

IC₅₀ CDK₂ ±SD µg/ml)

1

15+1.8

2

18+2.8

3

10+1.3

4

11+2.4

6

20+3.5

11

4.0+1.8

12

11+3.8

13

4.8+1.0

15

12+5.3

16

5.0+2.8

17

5.2+2.8

Olomoucine

5.0+1.0